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1a. What is the estimate of the common population proportion? 1b. The computed z-test statistic value for this scenario is -1.83. What is the corresponding p-value for the observed test statistic?   1c. True or False: The p-value provides the probability that the rate of completing a task is lower for tab collectors than streamlined searchers 1d. Based on the p-value, the researcher fails to reject the null hypothesis. Which of the following is NOT possible about these results? a. Result is correct b.  Result is incorrect -- a Type I error was made c.  Result is incorrect -- a Type II error was made

1a. What is the estimate of the common population proportion? 1b. The computed z-test statistic value for this scenario is -1.83. What is the corresponding p-value for the observed test statistic?   1c. True or False: The p-value provides the probability that the rate of completing a task is lower for tab collectors than streamlined searchers 1d. Based on the p-value, the researcher fails to reject the null hypothesis. Which of the following is NOT possible about these results? a. Result is correct b.  Result is incorrect -- a Type I error was made c.  Result is incorrect -- a Type II error was made

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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1a.

What is the estimate of the common population proportion?

1b. The computed z-test statistic value for this scenario is -1.83. What is the corresponding p-value for the observed test statistic?

 

1c. True or False: The p-value provides the probability that the rate of completing a task is lower for tab collectors than streamlined searchers

1d.

Based on the p-value, the researcher fails to reject the null hypothesis. Which of the following is NOT possible about these results?

a.
Result is correct
b. 
Result is incorrect -- a Type I error was made
c. 
Result is incorrect -- a Type II error was made
Among the 180 participating college students, 90 students were labeled as “tab collectors" (Group 1) and 90 students were labeled as “streamlined searchers" (Group 2). The researchers would like to use the results of this study to assess if the population proportion of students who completed a task among "tab collectors" (Group 1) is less than that of students labeled "streamlined searchers" (Group 2), at a 1% significance level. Since you are currently enrolled in a statistics course, they ask for your help in understanding the analyses. The following table displays the observed counts of task completion for the two groups. Task Completed Task Incomplete Total 1 = Tab Collectors 49 41 90 2 = Streamlined Searchers 61 29 90 Total 110 70 180
Transcribed Image Text:Among the 180 participating college students, 90 students were labeled as “tab collectors" (Group 1) and 90 students were labeled as “streamlined searchers" (Group 2). The researchers would like to use the results of this study to assess if the population proportion of students who completed a task among "tab collectors" (Group 1) is less than that of students labeled "streamlined searchers" (Group 2), at a 1% significance level. Since you are currently enrolled in a statistics course, they ask for your help in understanding the analyses. The following table displays the observed counts of task completion for the two groups. Task Completed Task Incomplete Total 1 = Tab Collectors 49 41 90 2 = Streamlined Searchers 61 29 90 Total 110 70 180
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